Well one thing's for sure: If something were on fire up here, Sinclair would not want to have to rely on Jack to climb up a rope to save him

Another thing is also for sure: when they get back to Sinclair's apartment, they're not doing anything until Jack takes a bath. I mean really, at least the rotting corpse is only one kind of gross. Jack's got a whole assortment, a menagerie of grossness on his sweater alone, never mind the rest of him.

"I spotted a crawl space in the last room there," he tells him, gesturing at the third door. "Looks to go right through to another room. Unless you've got any other ideas." You know. So they don't have to do any more backtracking.